Perforating machine



Jan- 9, 1940- s. E. 'ROSENBERG PERFQRATING MACHINE Filed July 19,- 1938 my NTOR ab: ATTORNEY Patented Jan. 9, 1940 antenn 'Stig E. Rosenberg, Brocktoi" iibfiuca bh. my. 19; lee'als iarno'. 219,686 2 Claims. (01. fer-+93) The present in'vention relates .to v perforating machines which are used in manyindustries. and which have a wide usexin thewmanufactureilof 'shoes-to ornament various forms ofishoeuppers and-parts thereo fv i i The die, par-ticularlyin the shoe industry, comprises'one of a series of idles, vthercutting; edges of each of which are differently arranged. .to ornament the i work pieceswith different designs. The series of idiesecomprise-a repertoire from which each die iswithdrawn for use andi-tocwhich the die is-returned after use. Some of theudies in therepertoire have been usedforseveral seasons and, in consequence, the cutting edges have becomeworn to such arr-extent that they do' not lie-in'ahorizontal planei J In my application serial No. 201,699, filed April 13, 1938, I disclosed a perforating machine hav inga perforating die and adiestrikingplate, I at least one-ofwhich is -mounted-- to yield. under resistance from the other, between which the' modeof operatioi'i', it -is'-e'ssentia1- that the cut- I ting edges liefin a horizontal-plane, thus preeluding from use m-any old--dies in the shoe manufacturersrepertoire.

The principal object of the presentinventi'on is to produce a perforating-machine embodying the desirable features of the invention disclosed in my applicationhereinbefore identified-in-a modified form in order that the-shoe manufacturer may use the old dies in the repertoire thereof. a i H 1 To the accomplishment of this object, the various features of the presentinvention-reside--in certainconstructions and arrangements of parts,

hereinafter described and then'set'forthin- 'the appended claims, which possess advantages readily understood by those skilled the art;

The various features ofthe present invention i will be understood readily from-an-inspection of the accompanying drawing, in which':

Figure 1 is a detail View in front elevation showing the various features of the invention embodied ina perforating machine -of-the Brockton type in'which th'e striliin g pl'atein moving-downwardly impales the work-upon the upstanding cutting'edges' 'of'the-die; the means independent of'the cutting edges for limiting the depth the cutting edges penetrate into the paper cutting bed being shown as located on the die;

Fig. 2 is a view similar to Fig. 1, but showing the position of the parts after the cutting edges .aie stan s ro amen Qiuf f el te] rcvidedew tha papers uf, t ei nde s eed t at. th m hin s-in v dediw th. th inape es pp y.ro rtheinaper re.-

W dcm l .QIIQLHE pap r, fe d;v disc sed i nzmy Patent NQ,.1,2 98 86 -;eplun e r s-rrecip oh ate :ve ti ally. to a sev e paper hack d di str kin v n ateili; te limpalelth q ikzfill th upstanding. cu tin ie e of adiefl wh hlis'moun ,edlon a; blo k .l.0,;w,hich i$;1 1t e. b1QQk; J 6i dis- --closed -.in: Fig.2:10f my Patent No. 2,108,447, Feb- Juaryv 115,115.38. j. i

cedeeat aemie iin predate tt s-b dand 1'.

. F -.13 liss s ieili-y e l nema 9 th d e th stri ed i e n been r b w Sho nn n -pa in. 1

F qo renie qe n. is l s re; th ve fle tureszi i th re ent; i i Q v. i -abe 1 7 a d-aed fil scri dwa b in embo d th .BFQ liie rf,;.e erat n mac i e th c stru imeedrixqde 9 c er t en of-'.-iv hisd sclo ed 2 6 693 2 9 3 9 9 and r qdyinsieeeranei s: eatu e v f re e t; vq es.., i s:iliesenie cens iie on andme lo operation as t e "impatie e f a in ma hi il les i ncmy h .:.r. rssure i i iment 35,1; is ese i e '3 9f th s.s e etzha ;been ema at d; tocimpar to the plunger orcpla ten 2| i new; marinara i Fig-"lit wnwardly. matin laten or n cleic e r tin machine bed. 8,

, For purposes of discidsiiie' theidie fi iscillustrated andtdescribed; as a combined.ink -marking and perforating .5 die; of the: type; disclosedgin my :pending applicatiom serial N0- l9 .;299,- filed -March 1,119.38} As usual ingthistype of die,; the perforatingitubesetlrand the knife I2. iiFig. 7:31) are mounted;respectively,in; a :tube: holder plate ;l;3, -tand a knife holdereplate, I4. which are. supof which project beyond the corresponding edges of the block (Figs. 1 and.2), to form ledges l9 which slide in the guideways 20 of the tracks 2| projecting forward-1y from the block l0,

e t N0, 85il8 YeXce t tha block 16 and the plate l8, the sheet being held of the striking plate from the plane of the cut ting edges of the dies has been made less-than.

the length of the impaling stroke of the plunger 4, so either the die, the die striking plate, or both of them, must yield to prevent breakage.

Forpurposes of disclosure, Fig. 1 illustrates the die striking plate 1 as being mounted yieldingly on the plate 6, the die as. being mounted yieldingly on the block I0, and the block it as being mounted yieldingly on its supporting bed, which is like the bed 12 disclosed in my Patent No. 2,108,447, but it will be understood by those skilled in the artthat generally only one form of thethre yields illustrated in Fig. 1 need be employed at a time, although an unusual operating. condition may require more than one of the yields and possible all three of them. While one df the yields is illustrated as being embodied in the die', it may be more practicable to restrict the location of the yield to another readily removable part of the-machine, such as between the plates 6 and 1 (Figs. 1 and 2), or on the bottom of the block W, thus to avoid building a yield into each die of the interchangeable series.

Referring to Figs. 1 and 2, the die-striking plate I is tapped to receive the screwed ends-of bolts 22, the shanks of which pass loosely through the plate 6 and a sheet of rubber 23 interposed between the plates 6 and 1, ahead 24 on the bolt 22 serving to limit normally the position of the die striking plate I relatively to the plate 6.

Referring to Figs. 1 and 2, a sheet of rubber 25 is interposed between the bottom of the die in place in'the manner disclosed in my application Serial No. 201,699, filed April 13, 1938.

Referring to Figs. 1 and 2, a sheet of rubber 26 is interposed between the bottom of the block Ill and a plate 21, the rubber sheet 26 and the plate 21 being secured to the block [0 to form a yield therefor by posts 28 which are secured'to the block I0 in a manner similar to the corresponding posts disclosed in my-application Serial No. 201,699.

In accordance with the broad features of the invention disclosed in my Patent No- 2,093,099,

the work is mounted upon acombined work support and stripper plate 29, it being understood that the stripper plate is provided with apertures to permit the perforating, cutting and cutting edges of the die, the entire pressure exerted by the striking plate is transmitted through the work to the cutting edges of the die, but as the cutting edges of the die engage the paper cutting bed at the moment they pierce the work,the cutting edges of the die and the striking plate are protected from injury. If,

=.: without more, the cutting edges of the die were to complete the penetration of the paper cutting bed and pierce it, the impact between the cutting edges. of the die and the striking plate would cause'serious damage thereto.

In order-to limit the depth the cutting edges of the die penetrate into the paper cutting bed, the plate '9 on the die is provided with hardened steel means having die striking impact surfaces arranged slightly above the plane of the cutting edges of the die. For purposes of disclosure, these'hardened steel means are illustrated as elongated blocks, 30, 3|, 32 and 33. The blocks 30, 3!, 32 and 33 are secured rigidly to the plate 9 in a location to clear the work and to engage the striking plate I in a location to clear the paper cutting'bed 8. The blocks operate through openings formed in the stripper plate.

The shape and location of these hardened steel means, broadly considered, is immaterial so long as they limit the depth the cutting edges of the die penetrate into the paper cutting bed 8. When they are mounted on the die, their impact surfaces should be arranged in a plane slightly above the cutting edges of the die. If they were mounted on the striking plate 1, their impact surfaces would be arranged to contact some fixed part of the die clear of the work at a time when the cutting edges have penetrated into the paper cutting bed 8, but have not pierced it. Preferably, the means for limiting the depth the cutting edges of the die penetrate into the paper cutting bed 8 are interposed between the striking plate and the die, whether or not they are all on the die, or all on the striking plate, or divided between them.

What is claimed as new, is: U

1. In a perforating machine, the combination with a perforating die and a die striking plate, at least one of which is mounted to yield under resistance from the other, between which the work is penetrated and pierced by the cutting edges of the die, a paper cutting bed for the die striking plate, and means for causing the cutting edges of the die to receive the entire work penetrating and piercing pressure, of means independent of the cutting edges and interposed between the die and the striking plate for limiting the depth the cutting edges penetrate into the paper cutting bed.

2. In a perforating machine, the combination with a perforating die and a die striking plate, at least one of which is mounted to yield under resistance from the other, between which the work is penetrated and pierced by the cutting edges of the die, a paper cutting bed for the die striking plate, and means for causing the cutting edges of the die to receive the entire work penetrating and piercing pressure, of means mounted on the die independent of its cutting edges and arranged to engage the striking plate independent of its cutting bed for limiting the depth the cutting edges penetrate thereinto.

STIG E. ROSENBERG. 

